glasmann



(No Model.) 2 Shets-Sheet 1.

J. H. GLASMA-NN. I

. GONGBNTRATOR.

No. 541,202. Patented June 18, 1895.

BY I I W ATTORNEY INK uonms Perms m Pno'mum.. WASHINGTON o c (No Model.) J- H. GLAVSMANN: 2 Sheets-Sheet 2. GONGENTRATOB.

No. 541,202. Patented June 18, 1895.

l '7'1NVENT0R- f BY v I ATTORNEY d 1 i a Ba 5 i i l I L ll llllll II H lllllllllLll H 3 llllllu'lllill WITNES UNrrnD STATES BP-ATENT' OFFICE.

JOHN H. GLASMANN, OF DENVER, COLORADO, ASSIGNOROF ONE-HALF To MARY CAMPBELL, on SAME PLACE.

CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 541,202, dated June 18, 1895. Application filed March 20, 1894. Serial No 504,477. (No model.)

To all whom it may concern:

Be it known that 1, JOHN H. GLASMANN, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Concentrators;

and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification. 4 7

My invention relates to improvements in concentrators, specially designed for treating placer material, and consists of the features, arrangements and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of the machine. Fig. 2 is a vertical longitudinal section taken therethrough. Fig. 3 isa top or plan view of the same. Fig. 4 is a plan view of the riffle-box. Fig. 5 is a similar view of the amalgamating-trough. Fig. 6 is an enlarged fragmentary detail View illustrating the manner of forming the riftles. Fig. 7 is an elevation of the roller attached to the framework of the machine and adapted to engage the amalgamating-plate.

Similar reference characters indicating corresponding parts or elements in these views let the numeral 5 designate the top bars, 6 the bottom bars, and 7 the upright or vertical bars, comprising the framework of the machine. Between the top bars 5, and at the head of the machine, is located the hopper 8 supported by the leaf-springs 9 made fast to the framework at one extremity, and bearing against flanges formed on the hopper at the opposite extremity, whereby the latter is spring supported and movable. But one spring 9 and one flange S are shown in the drawings. It must be understood, however, that there are two springs and two flanges, one on each side of the hopper.

The material to be treated passes from the hopper into a separating box 10, falling first upona screen 12 attached to the upper ex- 13 and 14 attached to the framework of the.

machine, and allowing the box an oscillating movement. The box 10 is suitablyinclined as shown in the drawings; and this inclination may be regulated by the adjustment of the straps let upon their supporting pins 15, said straps being provided with several holes 14.,

one above another.

The required movement is imparted to the separating box from a shaft 16 carrying a crank arm 17, the latter being connected by means of a pitman 18 with an upright arm 19 made fast to a transverse rod 20 secured to the top of box 10. The shaft 16 carries asprocket wheel 21 connected by means of a chain 22 with another larger sprocket wheel 23 made fast to one extremity of a crankshaft 24, while to the opposite extremity of said shaft is at tached the crank wheel 25. It will thus be seen that by turning the last named wheel, motion will be imparted to the separating box through the medium of the mechanical elements named, to-wit, the shafts, the sprocket wheels mounted thereon; the chain connecting the wheels; the crank on one shaft; and the pitman.

The-box 10 is further provided with a .plate 1O attached to its bottom at a point just below the perforated part 10, and is oppositely inclined to the bottom, whereby part of the the box is carried forwarda suitable distance before passing to the riffle box 26. This last named box is provided with transverse forwardly inclined riffles 26 formed in the bottom of the box, and integral therewith as shown in Fig. 6. The front faces of these riffles are curved, whereby they are better adapted to retain the fine mineral. This feature is also illustrated in Fig. .6. Thebox 26 is supported at a suitable inclination, its head extremity being highest. Its upper extremity is supported by hangers 27 attached to the materialwhich passes through the bottom of ICO stationary framework, and allowing the box an oscillating movement. The lower extremity of the box 26 is attached to the upper extremity of the amalgamating trough 28 as shown at 29. The box 26 and the trough 28 are further connected by m'etali straps 30 located near their forward'extremities. The upper extremity of the trough is further supported by the hangers 31 attached to the framero work, and allowing the trough and the box 26 an oscillating movement. that the riftle box and the amalgamating trough are supported by the hangers 27 and 31, the former being attached directly to the box, and the latter to the trough.

The bottom 28 of the'amalgamating'trough is composed of an amalgamated plate which is depressed out of a plane to form a pocket 28 adapted to catch any mineral which may escape the surface of the plate.

A roller 32 pivoted on arms 33 engages the plate 28. The arms'33 are pivoted at their upper extremities upon the stationary framework of the machine. This roller is preferably composed of rubber, and its'fnnction is to scour the rusty gold,-and' thus prepare it for amalgamation. The bottom of the plate 28 is supported by transverse cleats 28 made fast to the sides of the box. The lower ex- 0 tremityof the riflie' box is provided with a screen 26 through which the material which escapes the rifiies, passes to the'amalgamating trough. An oscillating movement is imparted to the riflie box and the amalgamating trough 5 from a shaft 34 carrying a fast sprocket wheel 35, around which passes the chain 22. The shaft 34 is provided with a crank arm 36 con nected by a pitman 37 with the bottom of the riftle box. It will thus be seen, that as the separating box is actuated, a similar movement is simultaneously imparted to the riffie box and the amalgamating trough.

The necessary water for treating the material is supplied through the medium of a pump 38 whose piston rod 39 is connected at It will be observed its upper extremity with a pitman 40'atta'ched to a crank arm'41 made fast on the shaft 16,

which also carries a fly-whee 42.

The water passes from the pump through a pipe 43 into a horizontal perforated section of '56 pipe tfi supported above'the separating box.

Hence the power for operation the pump mech- I anism is all communicated from the crank wheel 25 on the shaft 24.

discharges the water upon the material as it fallsfrom the hopperto the'box below. By

reason of the hopper being spring-supported, the material therein is subjected to a vibra 'tory action whereby themineral is made to seek the lowest positionI Hence,"the special function'of the spring supported'or vibratory hopper is to facilitate thecOnceiitratioWor separation of the mi'neralfrom' the-ganglia;

The springs of the hopper have'a further fund a 2 tion since they per'mitthe hoppertom'ovb downward by gravity 'sufiiciently to allow rocks or bowlders to passunder theperfor'ate'd pipe 43; The positionof this pipebeingquito close to the hopper andin front'th'ereof, these '70- rocks. might lodge against the pipeand clog the machine if the hopper were stationary;

Having thus described my invention, what I claim is In a concentrator, the combi'nat'ionwith' the 7';

frame, of the concentrating box supported thereon, the hopper located'above the'box'arid having flanges, leaf-springs attachedto'the frame and engaging the flanges of the'liopp'er',=

and a perforated pipe located above the bozt 8b .1

and in front of the hopper dischargmsaid' pipe being connected with any suitablewater" sup ply source, substantially as'de's'cribed:

In testimony whereof I affix my signature in the presence of two witnesses.

This perforated j I pipe 43islocated in front of the hopper and 55 

